Drill bit



FIG. 1 is a top plan view of a drill bit of my design.

FIG. 2 is a side elevational view of the drill bit of my design, wherein the broken lines are the environment of the drill bit shown in use and form no part of the claimed design; and,

FIG. 3 is another side elevational view of the drill bit of my design, rotated to show the vane hidden in FIG. 2, wherein the broken lines are the environment of the drill bit shown in use and form no part of the claimed design. 

CLAIM The ornamental design for a drill bit, as shown and described. 